JAW's Compound Interest Calculator

Need to calculate some compound interest? Punch in some numbers and let's see what we get!

Amount:

$

Interest rate:

% pa

Add an extra:

$ per

Time:

days
weeks years

Calculate interest:

Result: $

Your contribution

$

Interest

$

This calculator might not agree with other calculators, everyone has their
own methods of working out compound interest - that mostly favour the lender not the lendee! A good rule
of thumb is you will double your money for a one off investment at 10% in 7 years - or - at 7% in 10 years.